US1165713A - Sewing-machine. - Google Patents

Description

F. A. REECE.

SEWING MACHINE.

APPLICATION FILED JUNE 27, 1913 Patent-ed Dec. 28, 1915.

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F. A., REECE.

SEWING MACHINE.

APPLICATION FILED JUNE 27,1913.

1,165,?1 3. Patented Dec. 28, 1915.

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' FHA lV/(L/N 14. R5505 a. 335 mm aHIO'ZMM-J nivirnn snares PATENT ornicn FRANKLTN A. REECE, OF MANCHESTER, MASSACHUSETTS, ASSIGNOR TO THE REECE BUTTON HOLE MACHINE COMPANY, OF BOSTON, IEASSACHUSETTS, A CURPORATION OF MAIN E.

SEWING-MACHINE.

Application filed June 27, 1913.

To all whom it may concern.

Be it known that I, FRANKLIN A. REEOE, a citizen of the United States, residing at Manchester, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Sewing-li/Iachines, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to sewing machines, and more particularly to improvements in the mode of operating certain parts, and the mechanism for securing such operation.

The improvement is herein illustrated as applied to the operation of the take-up of a sewing machine, and in connection with such take-up, it enables certain desirable speed variations during the cycle of the take-up operation.

The invention consists in the novel devices, arrangements, combinations, and other features illustrated. and described herein.

First will be described one form in which theinvention can be embodied, and thereafter the novel features will be pointed out in the claims.

In the accompanying drawings forming a part hereof, Figure 1 is a left elevation of a sewing machine, more or less conventionally illustrated, the same being partly in section, taken on the plane 11 of Fig. 3. Fig. 2 is a diagram showing the preferred relative operation of the needle and the take-up. Fig. 3 is a rear elevation of the machine shown in Fig. 1, taken partly in section upon the plane 33.

Similar numerals indicate corresponding parts in the different figures.

It is an object of this invention to accomplish the results referred to, and to give the take-up or other part of the machine, a quick advance and slow return movement by means of a shaft which has a fixed position in the machine, and carries a pin which is ofi'set from the shaft and fitted to revolve about it, together with a link connection between the revolving pin and the take-up or part to be reciprocated.

The following detailed description indicates an embodiment: The general parts of the sewing machine comprise a frame or casing 9, which carries the operating parts. There will, as usual, be a main or pulley shaft 10, which is shown arranged horizon- Specification of Letters Patent.

Patented Dec. 28, 1915.

Serial No. 776,108.

tally and transversely. A gear 11 on the main shaft drives a pinion 12 on an auxiliary shaft 13. The shaft 13 carries a crank comprising the offset pin 14, and the side arms 15. A link 16 is shown extending from the crank pin to a pivotal connection 17, at the extremity of one arm of the pivoted take-up lever, 18, which may swing about an intermediately located pivot 19. The take-up itself consists of the extreme forward end of the lever, 18, where there inlay be provided a thread eye, wheel or the ire.

In order to explain the operation of the described mechanism the needle operation will first be referred to. On the same shaft 13 which carries the crank is an eccentric 20, whose strap 21 has a connection 22 to the rear end of a needle bar lever 23, which is connected at its forward end with a needle bar 24 carrying the needle 25. The main and auxiliary shafts 10 and 13 being assumed to rotate with uniform speed, the needle and the take-up will both reciprocate upwardly and downwardly in harmony with each other.

The needle movement may be as indicated in the diagram Fig. 2, wherein the curved line marked Needle indicates the needle to reach its lowest position at the point 135 and its high position at 315, or 180 in advance of the low position. The level of the work is indicated by a dotted line and it will be understood that the needle and takeup positions are inversely indicated so that the degree of descent is shown by the height of the curve at any given point.

Instead of operating the take-up to execute its take-up and return movements, each in 180, the proposal is that the return movement or descent of the take-up should be prolonged, and that the advance or take up movement should be quick'ened. The advantages of such operation will be understood by those skilled in the art. The ability to smoothly and efficiently take-up the thread in a very brief period of time after the needle is disengaged from the work, improves the sewing machine and enables a more satisfactory cooperation with the mechanism which handles the thread beneath the work-plate.

The mechanical movement introduced herein for operating the take-up and comprising the parts 13, 14, 15, 16, 17 and 18 is a species of link motion, whose mode of illustrate more than the result of the same.

The diagram Fig. 2 shows that the take-up passes from its highest point at Zero degrees to its lowest point at approximately 232. This slow descent or return movement is succeeded by a rapid advance or take-up movement beginning at 233 and completed at 360. The relative times of advance and return, therefore, instead of being equal are as 127 to 233. The mechanical movement which secures this valuable action would also, in some cases, be applicable to the operation of the needle bar, if it were desired to vary its periods of advance and return.

It will thus be seen that there has been described a sewing machine attaining the objects and advantages referred to, and embodying the principles of this improvement; and other advantages therein will be apparent to those skilled in the art.

Since matters of design, proportion, details and other features may be varied without departing from the principles of the im rovement, no limitation is intended to sue 1 features excepting so far as specified in the appended claims.

'VVhat is claimed is:

1. In a sewing machine, the combination of a rotary shaft as 18, a pivoted take-up arm, a crank on said shaft and a link connecting said crank and arm, said crank and link both being comparatively much shorter than the distance from the pivot of said arm to its point of connection to the link.

2. In a sewing machine, the combination of a rotary shaft as 13, a pivoted take-up arm, a crank on said shaft and a link connecting said crank and arm, said crank and link both being comparatively much shorter than the distance from the pivot of said arm to its point of connection to the link, a needle bar and connection from the shaft for length nearly equal to the crank arm length ,7 and substantially shorter than said take-up arm.

' In testimony whereof I affix my signature 1n presence of two wltnesses.

FRANKLIN A. Ranch.

Witnesses:

J. WVARREN NIoHoLs, THOMAS J. OARTY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patent Washington, 1). C. I i

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